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Parahyadina latistylis Mathis & Zatwarnicki 2019, sp. nov.
No full textParahyadina latistylis, sp. nov. (Figs. 53–58, Map 11) Diagnosis. This species is distinguished from congeners by the following combination of characters: Adults. Small shore flies, body length 1.23–1.77 mm. Head (Figs. 53–54): Lateroclinate fronto-orbital seta well developed, basal diameter comparable or only slightly reduced compared to basal diameters of vertical setae. Thorax (Figs. 53–54): Postsutural scutum with distinct, longitudinal vittae in rows between acrostichal setae and dorsocentral setae; 2 pairs of posterior dorsocentral setae, anterior seta shorter than posterior seta. Wing hyaline; costal section II shorter in length than costal section III; costal vein ratio 1.12–1.27; M vein ratio 0.30–0.32. Abdomen: Tergites 3–5 with ventrolateral margin shallowly rounded; male tergite 5 extended posteriorly in same plane as tergite 4. Male terminalia. (Figs. 55–58) Epandrium in posterior view (Fig. 55) an oval to almost diamond-shaped, lateral margins somewhat angulate, each surstylus subrectangular, ventral margin emarginated medially, bearing 4 longer setulae on ventral portion and with an apical, prominent setula, in lateral view (Fig. 56) with epandrium very narrow and straight, surstylus expanded, irregularly and broadly lanceolate, apical setulae prominent; cercus in posterior view (Fig. 55) irregularly oblanceolate, pointed tapered to narrowly rounded point dorsally, ventral margin broadly rounded, in lateral view (Fig. 56) irregularly semihemispherical, height almost twice width, dorsal margin rounded, posterior margin tapered to rounded point, generally covered with small setulae; aedeagus in lateral view (Fig. 58) comparatively small, length about half that of phallapodeme, L-shaped, with extended, basal arm much narrower, digitiform, than length of aedeagal body, main structure, thumb-like apex broadly rounded, in ventral view (Fig. 57) only slightly longer than basal width, truncate basally and apically, lateral margin tapered toward apex; phallapodeme in lateral view (Fig. 58) elongate, moderately narrow, base with short, anteriorly directed projection, just beyond midlength with a robust, large projection, thereafter tapered slightly to narrowly truncate apex, in ventral view (Fig. 57) elongate, narrow with 2 cross bars, one at base, the other sub-basally, thereafter parallel sided, narrow; gonite and hypandrium broadly fused, in lateral view (Fig. 58) robustly L-shaped, gonal portion shorter than hypandrial portion, margins sinuous and tapered to narrowly rounded apex, hypandrial portion, narrow, somewhat elongate, in ventral view (Fig. 57) wider than long, robust with large, tapered posterolateral extension, apex bearing 2 minute, dentate setulae, anterolateral angle also extended as a process that is parallel sided at base then tapered to pointed apex. Type Specimen. The holotype male is labeled “ NEW ZEALAND. N. Isl. TO: Tokaanu (37°58.2’S, 175°46.2’E), 3–5 January 2004 [,] W. N. Mathis / USNM ENT 00026320 [plastic bar code label]/ HOLOTYPE ♂ Parahyadina latistylis Mathis & Zatwarnicki NZAC [red].” The holotype is double mounted (minuten in a plastic block), is in excellent condition, and is deposited in the NZAC. Forty paratypes (15♂, 25♀; NZAC, USNM) bear the same label data as the holotype. Type locality. New Zealand. North Island. TO: Tokaanu (37°58.2’S, 175°46.2’E). Other specimens examined. NORTH ISLAND. NORTH ISLAND. BP: Paradise Valley (38°07.9’S, 176°09.9’E), 7 Feb 1998, W. N. Mathis (1♂, 1♀; USNM). ND: Hailes Road (quarry; 35°31.1’S, 174°25.8’E), 19 Feb 1998, W. N. Mathis (1♂; USNM). TO: Ikawhenua Range (E of Te Whaiti; 38°28.3’S, 176°59.4’E; 350 m), 4 Nov 1977, E. I. Schlinger (1♂; NZAC). WI: Mangawhero River (39°34.5’S, 175°15.7’E; 275 m), 9 Nov 1977, E. I. Schlinger (1♂; NZAC). SOUTH ISLAND. CO: Danseys Pass (2.2 km NE; 44°56.9’S, 170°24.2’E; 586 m), 11 Jan 2004, W. N. Mathis (3♂; USNM). KA: Hapuku Stream (42°13’S, 173°45.3’E; 420 m), 8 Jan 2004, W. N. Mathis (1♂; USNM); Seddon (Awatere River; 41°39.6’S, 174°04.6’E), 14 Feb 1998, W. N. Mathis (5♂; USNM). FD: Monowai River (45°46.7’S, 167°35.7’E; 171 m); 17–18 Jan 2004, W. N. Mathis (2♂; USNM). MC: Acheron River (43°19.7’S, 171°40.5’E; 772 m), 10 Jan 2004, W. N. Mathis (1♂; USNM); Lake Lyndon (43°17.6’S, 171°42.5’E), 15 Feb 1998, V. Hollmann, W. N. Mathis (10♂, 5♀; NZAC, USNM); Lake Pearson (43°05.6’S, 171°46.8’E; 612 m); 3 Feb 2004, W. N. Mathis (1♂; USNM); Simois Stream (43°17.8’S, 171°32.9’E; 130 m), 10 Jan 2004, W. N. Mathis (2♂; USNM). OL: Kingston (45°19.8’S, 168°42.7’E; 319 m); 26 Jan 2004, W. N. Mathis (1♂; USNM); Moke Lake (3.5 km S; 45°02.2’S, 168°34.7’E; 616 m); 28 Jan 2004, W. N. Mathis (1♂; USNM). SL: Cascade River (46°15.6’S, 167°54.6’E; 73 m); 15 Jan 2004, W. N. Mathis (1♂; USNM); Orepuki (46°17’S, 167°44.3’E), 8 Feb 1976, L. L. Deitz (1♂; NZAC); Te Waewae Lagoon (46°12.3’S, 167°38.1’E); 19 Jan 2004, W. N. Mathis (1♂; USNM). Distribution (Map 11). Australasian/Oceanian: New Zealand. North Island (BP, TO, WI), South Island (CO, KA, FD, MC, OL, SL). Etymology. The species epithet, latistylis, is of Latin derivation and means broad or wide style, referring to the shape of the surstylar apex. Remarks. External structures of the male terminalia of this species are similar to those of P. debilis, especially the robustly developed, apical extension of the surstylus. The shape of the gonites, however, differ considerably and distinguish this species, especially the anterior extensions that are tapered and flared laterally (Figs. 57–58), not bifurcated and oriented anteriorly, as in P. debilis.Published as part of Mathis, Wayne N. & Zatwarnicki, Tadeusz, 2019, Revision of the Shore-fly Genera Parahyadina Tonnoir and Malloch and New Zealand Hyadina Haliday (Diptera: Ephydridae), pp. 401-440 in Zootaxa 4623 (3) on pages 434-437, DOI: 10.11646/zootaxa.4623.3.1, http://zenodo.org/record/325853
Notiocoenia pollinosa Mathis
No full text4. Notiocoenia pollinosa Mathis Figs. 21–26, Map 4 Notiocoenia pollinosa Mathis 1980: 18.—Lizarralde de Grosso 1989: 59 –60 [list, Argentina].— Mathis and Zatwarnicki 1995: 250 [world catalog]. Diagnosis. Because this is the only known species of the pollinosa group, the diagnosis of the latter, as cited previously, will adequately serve to distinguish specimens of this species. Should additional species of this speciesgroup be discovered, character states of the male terminalia will undoubtedly distinguish them from the present species. Small to moderately small shore flies, body length 1.98–2.56 mm; generally shiny, dark brown dorsally. Head (Figs. 21–22): Frons width-to-length ratio 0.36–0.38; coloration of frons mostly pale brown with some faintly olivaceous to greenish tinges. Antenna unicolorous, black. Coloration of face unicolorous, whitish gray to silvery gray; antennal groove shallowly impressed. Eye height-to-width ratio 0.86–0.88; gena-to-eye ratio 0.11– 0.13; gena pale brown; well-developed genal seta 1. Thorax (Fig. 23): Mesonotum and scutellum concolorous, shiny, bronzish brown, except extreme anterior margin of mesonotum dull, grayish. Pleural areas gradually becoming paler brown ventrally, grayer, particularly forecoxa and katepisternum. Wing palely infuscate, pale brown, appearing dull; with 2 white spots on either side of crossvein dm-cu; costal vein ratio 0.14–0.16; M vein ratio 0.58–0.61. Legs unicolorous, black; fore- and hindfemora appearing swollen. Halter brownish yellow, unicolorous. Abdomen: Subshiny anteriorly, becoming distinctly shiny posteriorly; coloration grayish black anteriorly, becoming very dark greenish black posteriorly; female tergites becoming progressively longer posteriorly, also narrowing with gradual taper toward posterior end; male tergite 4 subequal to combined length of tergites 2 and 3; male tergite 5 subtrapezoidal, bluntly rounded apically, length about equal to length of tergite 4; male tergite 4 produced ventrally to acutely pointed apex; male sternite 4 subquadrate, becoming densely setose medioposteriorly. Male terminalia (Figs. 24–26): Epandrium generally setulose, in posterior view (Fig. 24) with dorsal 2 / 3 as an inverted U, more thinly developed dorsally, in lateral view (Fig. 25) dorsal arch of inverted U more thinly developed, thereafter ventrally in lateral view gradually becoming wider to level of ventral margin of cercal cavity, ventral 1 / 3 in posterior view (Fig. 24) flared laterally as bluntly rounded, lateral projections, posterior and anterior margins nearly parallel, posterior margin straight; ventral epandrial margin, which is probably the fused surstylus, obtusely angulate with a V-shaped medial notch and partial medial suture; cerci free in cercal cavity, not fused with epandrium, semihemispherical, short, subequal to ¼ length of epandrium and fused surstyli; aedeagus in lateral view (Fig. 26) elongate, conspicuously wider on basal half, apical portion narrowed, slender, pointed apically; gonite produced anteroventrally as curved parallel-sided slender process. Type material. The holotype male is labeled “ CHILE: Prov. Magallanes Rio Verde 12 Jan. 1966 Flint & Cekalovic/ HOLOTYPE Notiocoenia pollinosa Mathis [handwritten, red].” The holotype specimen is double mounted (glued to a paper point), is in good condition (although both basal flagellomeres are missing), and is deposited in the USNM (76069). The allotype female and four paratypes (2 ♂, 2 ♀; USNM) are labeled “ CHILE Chanillo Esperanza 25 -II- 1962 T. Cekalovic.” Other paratypes as follows: ARGENTINA: Rio Negro: Llao Llao (11.4 km E; 41 °03'S, 71 ° 32 'W; 760 m), 16 Nov 1966, M. E. Irwin and E. I. Schlinger (2 ♂, 3 ♀; CAS); Puerto Moreno (3.7 km S; 41 °07'S, 71 ° 25 'W; 800 m), 17 Nov 1966, M. E. Irwin, E. I. Schlinger (1 ♀; CAS); San Carlos de Bariloche (49 °09'S, 71 ° 18 'W), Nov 1926, R. C. and E. Shannon (1 ♀; USNM). Santa Cruz: Lago Argentino (49 ° 45 'S, 72 °W), 26 Feb 1953, A. Willink (1 ♂, 1 ♀; FML). Type locality. Chile. Magallanes: Río Verde (43 ° 23.8 'S, 72 ° 31.5 'W). Other specimens examined. CHILE. Aisen: Chile Chico (4.8 km W; 46 ° 33 'S, 71 ° 44 'W; 400 m; meadow), 22 Nov 1966, M. E. Irvin, E. I. Schlinger (1 ♂, 1 ♀; CAS). Magallanes: Río Verde (43 ° 23.8 'S, 72 ° 31.5 'W), 12 Jan 1966, O. S. Flint, Jr., T. Cekalovic (1 ♂, 2 ex; USNM); Río Tres Brazos (53 ° 16 'S, 70 ° 56 'W), 9–13 Jan 1966, O. S. Flint, Jr., T. Cekalovic (4 ♀; USNM); Punta Arenas (53 °09'S, 70 ° 55 'W), 9–15 Jan 1966, O. S. Flint, Jr., T. Cekalovic, 22 Feb 1962, T. Cekalovic (3 ♀; USNM); Laguna Amarga (4 km W; 5059 'S, 72 ° 45 'W), 7 Dec 1966, M. E. Irwin, E. I. Schlinger (4 ♂, 4 ♀; CAS); Laguna Amarga (4 km W; 51 °S, 72 ° 48 'W; 300 m), 7 Dec 1966, M. E. Irwin, E. I. Schlinger (3 ♂; CAS); Laguna Azul (50 ° 52 'S, 72 ° 42 'W), 1 Feb 1952, (2 ♂, 1 ♀; FML); Cerro Mina Rica (53 °07'S, 71 °07'W), 13 Jan 1952 (1 ♀; FML); Dos Lagunas (48 ° 52 'S, 72 ° 52 'W), 27 Jan 1957, T. Cekalovic (1 ♂; USNM). Distribution (Map 4). Neotropical: Argentina (Rio Negro, Santa Cruz), Chile (Aisen, Magallanes), between 41 °– 55 °S. MAP 4. Distribution map for Notiocoenia pollinosa Mathis.Published as part of Mathis, Wayne N. & Marinoni, Luciane, 2016, Revision of Ephydrini Zetterstedt (Diptera: Ephydridae) from the Americas south of the United States, pp. 1-110 in Zootaxa 4116 (1) on pages 21-23, DOI: 10.11646/zootaxa.4116.1.1, http://zenodo.org/record/25732
Parahyadina irwini Mathis & Zatwarnicki 2019, sp. nov.
No full text<i>Parahyadina irwini</i>, sp. nov. <p>(Figs. 43, 45–48, Map 9)</p> <p> <b>Diagnosis.</b> This species is distinguished from congeners by the following combination of characters: Adults. Small shore flies, body length 1.35–1.85 mm.</p> <p> <i>Head</i> (Fig. 43): Lateroclinate fronto-orbital seta well developed, basal diameter comparable or only slightly reduced in comparison to basal diameters of vertical setae.</p> <p> <i>Thorax</i> (Fig. 43): Postsutural scutum without distinct, longitudinal vittae between acrostichal setae and dorsocentral setae. Wing hyaline; costal vein ratio 1.10–1.19; M vein ratio 0.23–0.38.</p> <p> <i>Abdomen.</i> Tergites 3–5 with ventrolateral margin shallowly rounded; male sternite 4 weakly sclerotized, as 2 relatively approximate, lateral, longitudinal bars; male tergite 5 extended posteriorly in same plane as tergite 4; male sternite 5 Y-shaped, arms flared anterolaterally, moderately well developed. <i>Male terminalia</i> (Figs. 45–48): Epandrium in posterior view (Fig. 45) broadly oval with ventromedial projections tapered to narrowly rounded apex, bearing 4 setulae near midlength and a prominent apical setulae, in lateral view (Fig. 46) with dorsal 2/3 narrow, linear, more or less parallel sided; surstylar length (from rounded, medial bump) about ½ height of cercus, angled slightly posteromedially, in lateral view (Fig. 46) with a medial, short, hook-like protrusion, tapered from wider base to narrowly rounded apex, apex bearing a single, short seta, also bearing 4 setulae in a vertical line along anterior margin at midlength; cercus in posterior view (Fig. 45) irregularly obovate, tapered to point dorsally, ventral margin broadly rounded, generally covered with small setulae, in lateral view (Fig. 46) height almost twice width with anterior margin somewhat straight, posterior margin irregularly arched; aedeagus heavily sclerotized, in lateral view (Fig. 48) tubular, elongate, with 2 basal prongs, dorsal protrusion about 3 times length of basal one, apically as an abruptly narrowed, acutely pointed projection, length slightly less than aedeagal width at midlength, in ventral view (Fig. 47) about as wide as long, base broadly rounded, apical third narrowed, short, parallel sided with a short, medial projection; phallapodeme in lateral view (Fig. 48) irregularly triangular with 2 moderately narrowed angles and truncate, wide, keel as third angle, in ventral view (Fig. 47) narrowly hour-glass shaped, base narrowly Y-shaped with short arms, apex tapered to point, widest subapically; gonite and hypandrium broadly fused, in lateral view (Fig. 48) robustly L-shaped, gonal portion bearing a digitiform, shallowly curved projection, hypandrial portion longer than wide, narrowly rectangular, in ventral view (Fig. 47) generally irregularly rectangular, convexly truncate basally, becoming slightly wider posteriorly, posterior margin abruptly narrowed as digitiform, medially curved projections.</p> <p> <b>Type Specimen.</b> The holotype male is labeled “ <b>NEW ZEALAND.</b> S. ISL. NN: Flora Saddle (41°11.4’S, 172°44.2’E), 12Feb 1998 [,] Wayne N. Mathis/ USNM ENT 00085386 [plastic bar code label]/ HOLOTYPE ♂ <i>Parahyadina irwini</i> Mathis & Zatwarnicki NZAC [red].” The holotype is double mounted (minuten in block of plastic elastomer), is in excellent condition, and is deposited in NZAC. Seven paratypes (4♂, 3♀; NZAC, USNM) bears the same label data as the holotype except for one male for which V. Hollmann was the collector.</p> <p> <b>Type locality.</b> New Zealand. South Island. NN: Flora Saddle (41°11.4’S, 172°44.2’E).</p> <p> <b>Other specimens examined.</b> <b>NORTH ISLAND. ND:</b> Whananaki (7 km SW; freshwater creek; 35°32.9’S, 174°24.6’E), 6 Oct 2002, D. and W. N. Mathis (1♂; USNM).</p> <p> <b>SOUTH ISLAND. CO:</b> Danseys Pass (1.2 km SW; 44°57.2’S, 170°22.0’E; 856 m), 11 Jan 2004, W. N. Mathis (1♂, 2♀; USNM); Danseys Pass (2.2 km NE; 44°56.9’S, 170°24.2’E; 586 m), 11 Jan 2004, W. N. Mathis (2♂, 2♀; USNM). <b>FD:</b> Borland Saddle (22 km W Monowai; 45°44.8’S, 167°23.2’E; 945–988 m); 18 Jan 2004, W. N. Mathis (2♂, 2♀; USNM); Lake Monowai (45°48.7’S, 167°31.3’E; 225 m); 17–20 Jan 2004, W. N. Mathis (1♂; USNM); Monowai River (45°46.7’S, 167°35.7’E; 171 m); 17–18 Jan 2004, W. N. Mathis (4♂, 3♀; USNM). <b>MC:</b> Acheron River (43°19.7’S, 171°40.5’E; 772 m), 10 Jan 2004, W. N. Mathis (3♂, 3♀; USNM); Lake Pearson (43°05.6’S, 171°46.8’E; 612 m); 3 Feb 2004, W. N. Mathis (4♂, 3♀; USNM). <b>NN:</b> Graham Valley (41°12.1’S, 172°50.8’E), 12 Feb 1998, W. N. Mathis (1♂, 1♀; USNM). <b>SL:</b> Orepuki (46°16.9’S, 167°44.3’E), 8 Feb 1976, L. L. Deitz (1♀; NZAC).</p> <p> <b>Distribution</b> (Map 9). Australasian/Oceanian: New Zealand. North Island (ND), South Island (CO, FD, MC, NN, SL).</p> <p> <b>Etymology.</b> The species epithet, <i>irwini,</i> is a Latinized genitive patronym to honor the contributions of Anthony G. Irwin to our study of shore flies (Diptera: Ephydridae), especially his editing skills and knowledge of the literature.</p> <p> <b>Remarks.</b> Externally, this species is very similar to <i>P. edmistoni, P. latistylis,</i> and <i>P. debilis</i> but is distinguished from these by the following combination of characters: Male tergites three through five with ventrolateral margins shallowly and bluntly rounded, not acutely developed, as in <i>P. edmistoni</i>; and male tergite five extends posteriorly in the same plane as tergite four. Structures of the male terminalia distinguish this species, especially the moderately short and thin surstylus and the robust and L-shaped gonite (Fig. 48). The length of the gonite in lateral view (Fig. 48) is about twice its basal width, the apex is irregularly and bluntly rounded, and there is a lateral, digitiform prominence.</p>Published as part of <i>Mathis, Wayne N. & Zatwarnicki, Tadeusz, 2019, Revision of the Shore-fly Genera Parahyadina Tonnoir and Malloch and New Zealand Hyadina Haliday (Diptera: Ephydridae), pp. 401-440 in Zootaxa 4623 (3)</i> on pages 429-432, DOI: 10.11646/zootaxa.4623.3.1, <a href="http://zenodo.org/record/3258532">http://zenodo.org/record/3258532</a>
Studium deformačních procesů v slitinách Mg-Gd
No full textNázev práce: Studium deformačních procesů v slitinách Mg-Gd Autor: Andrea Szabóová Katedra / Ústav: Katedra fyziky materiálů Vedoucí bakalářské práce: doc. RNDr. Kristián Mathis, DrSc. Abstrakt: Předložená práce se zabývá studiem deformačního chování binárních slitin hořčík-gadolinium v závislosti na koncentraci Gd a na teplotě deformace. Extrudované vzorky vykazovaly poměrně silnou výchozí texturu. Tlakové deformační zkoušky byly prováděny při pokojové teplotě a při 200řC. Souběžně s deformací byla zaznamenávána i akustická emise, kterou jsme analyzovali s pokročilými statistickými metodami. Kombinací těchto dvou experimentálních metod jsme ukázali, že v počátečním stádiu deformace dominuje dvojčatění, ale v pozdější fázi plastická deformace proběhne převážně nebazálním kluzem. S vyšším obsahem Gd klesá velikost dvojčat, v důsledku snížení mobility dvojčatových hranic příměsovými atomy. Při vyšších deformačních teplotách dvojčatění bylo usnadněno tepelnou aktivací. Závěry byly ověřené kombinací optické světelné a skenovací elektronové mikroskopie. Klíčová slova: hořčíková slitina, deformační zkoušky, akustická emise, mikroskopieTitle: Investigation of deformation mechanisms in Mg-Gd alloys Author: Andrea Szabóová Department: Department of Physics of Materials Supervisor: doc. RNDr. Kristián Mathis, DrSc. Abstract: In the present work, the deformation behavior of magnesium-gadolinium binary alloys was investigated. Dependence on the concentration of Gd and deformation temperatures was studied. Extruded samples had relatively strong initial texture. Compression tests were done at room temperature and 200řC. Simultaneously with deformation acoustic emission was recorded. Data from acoustic emission was analyzed with advanced statistical methods. Results of the combination of these two experimental methods indicated that at the beginning of the deformation twinning is the dominant mechanism. In the following stage of plastic deformation non-basal slip systems became the governing deformation mechanism. With higher content of Gd the size of twins decreases as a result of the decreased mobility of twin boundaries caused by solute atoms. At higher temperatures twinning activity was increasing. In addition, results were confirmed by optical light and scanning electron microscopy. Keywords: magnesium alloy, deformation tests, acoustic emission, microscopyKatedra fyziky materiálůDepartment of Physics of MaterialsMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Notiocoenia pollinosa Mathis
No full text4. <i>Notiocoenia pollinosa</i> Mathis <p>Figs. 21–26, Map 4</p> <p> <i>Notiocoenia pollinosa</i> Mathis 1980: 18.—Lizarralde de Grosso 1989: 59 –60 [list, Argentina].— Mathis and Zatwarnicki 1995: 250 [world catalog].</p> <p> <b>Diagnosis.</b> Because this is the only known species of the <i>pollinosa</i> group, the diagnosis of the latter, as cited previously, will adequately serve to distinguish specimens of this species. Should additional species of this speciesgroup be discovered, character states of the male terminalia will undoubtedly distinguish them from the present species. Small to moderately small shore flies, body length 1.98–2.56 mm; generally shiny, dark brown dorsally.</p> <p> <i>Head</i> (Figs. 21–22): Frons width-to-length ratio 0.36–0.38; coloration of frons mostly pale brown with some faintly olivaceous to greenish tinges. Antenna unicolorous, black. Coloration of face unicolorous, whitish gray to silvery gray; antennal groove shallowly impressed. Eye height-to-width ratio 0.86–0.88; gena-to-eye ratio 0.11– 0.13; gena pale brown; well-developed genal seta 1.</p> <p> <i>Thorax</i> (Fig. 23): Mesonotum and scutellum concolorous, shiny, bronzish brown, except extreme anterior margin of mesonotum dull, grayish. Pleural areas gradually becoming paler brown ventrally, grayer, particularly forecoxa and katepisternum. Wing palely infuscate, pale brown, appearing dull; with 2 white spots on either side of crossvein dm-cu; costal vein ratio 0.14–0.16; M vein ratio 0.58–0.61. Legs unicolorous, black; fore- and hindfemora appearing swollen. Halter brownish yellow, unicolorous.</p> <p> <i>Abdomen:</i> Subshiny anteriorly, becoming distinctly shiny posteriorly; coloration grayish black anteriorly, becoming very dark greenish black posteriorly; female tergites becoming progressively longer posteriorly, also narrowing with gradual taper toward posterior end; male tergite 4 subequal to combined length of tergites 2 and 3; male tergite 5 subtrapezoidal, bluntly rounded apically, length about equal to length of tergite 4; male tergite 4 produced ventrally to acutely pointed apex; male sternite 4 subquadrate, becoming densely setose medioposteriorly. Male terminalia (Figs. 24–26): Epandrium generally setulose, in posterior view (Fig. 24) with dorsal 2/3 as an inverted U, more thinly developed dorsally, in lateral view (Fig. 25) dorsal arch of inverted U more thinly developed, thereafter ventrally in lateral view gradually becoming wider to level of ventral margin of cercal cavity, ventral 1/ 3 in posterior view (Fig. 24) flared laterally as bluntly rounded, lateral projections, posterior and anterior margins nearly parallel, posterior margin straight; ventral epandrial margin, which is probably the fused surstylus, obtusely angulate with a V-shaped medial notch and partial medial suture; cerci free in cercal cavity, not fused with epandrium, semihemispherical, short, subequal to ¼ length of epandrium and fused surstyli; aedeagus in lateral view (Fig. 26) elongate, conspicuously wider on basal half, apical portion narrowed, slender, pointed apically; gonite produced anteroventrally as curved parallel-sided slender process.</p> <p> <b>Type material.</b> The holotype male is labeled “ CHILE: Prov. Magallanes Rio Verde 12 Jan. 1966 Flint & Cekalovic/ HOLOTYPE Notiocoenia pollinosa Mathis [handwritten, red].” The holotype specimen is double mounted (glued to a paper point), is in good condition (although both basal flagellomeres are missing), and is deposited in the USNM (76069). The allotype female and four paratypes (2♂, 2♀; USNM) are labeled “ CHILE Chanillo Esperanza 25-II-1962 T. Cekalovic.” Other paratypes as follows: <i>ARGENTINA: Rio Negro:</i> Llao Llao (11.4 km E; 41°03'S, 71°32'W; 760 m), 16 Nov 1966, M. E. Irwin and E. I. Schlinger (2♂, 3♀; CAS); Puerto Moreno (3.7 km S; 41°07'S, 71°25'W; 800 m), 17 Nov 1966, M. E. Irwin, E. I. Schlinger (1♀; CAS); San Carlos de Bariloche (49°09'S, 71°18'W), Nov 1926, R. C. and E. Shannon (1♀; USNM). <i>Santa Cruz:</i> Lago Argentino (49°45'S, 72°W), 26 Feb 1953, A. Willink (1♂, 1♀; FML).</p> <p> <b>Type locality.</b> Chile. Magallanes: Río Verde (43°23.8'S, 72°31.5'W).</p> <p> <b>Other specimens examined.</b> <i>CHILE. Aisen:</i> Chile Chico (4.8 km W; 46°33'S, 71°44'W; 400 m; meadow), 22 Nov 1966, M. E. Irvin, E. I. Schlinger (1♂, 1♀; CAS). <i>Magallanes:</i> Río Verde (43°23.8'S, 72°31.5'W), 12 Jan 1966, O. S. Flint, Jr., T. Cekalovic (1♂, 2ex; USNM); Río Tres Brazos (53°16'S, 70°56'W), 9–13 Jan 1966, O. S. Flint, Jr., T. Cekalovic (4♀; USNM); Punta Arenas (53°09'S, 70°55'W), 9–15 Jan 1966, O. S. Flint, Jr., T. Cekalovic, 22 Feb 1962, T. Cekalovic (3♀; USNM); Laguna Amarga (4 km W; 5059'S, 72°45'W), 7 Dec 1966, M. E. Irwin, E. I. Schlinger (4♂, 4♀; CAS); Laguna Amarga (4 km W; 51°S, 72°48'W; 300 m), 7 Dec 1966, M. E. Irwin, E. I. Schlinger (3♂; CAS); Laguna Azul (50°52'S, 72°42'W), 1 Feb 1952, (2♂, 1♀; FML); Cerro Mina Rica (53°07'S, 71°07'W), 13 Jan 1952 (1♀; FML); Dos Lagunas (48°52'S, 72°52'W), 27 Jan 1957, T. Cekalovic (1♂; USNM).</p> <p> <b>Distribution</b> (Map 4). <i>Neotropical:</i> Argentina (Rio Negro, Santa Cruz), Chile (Aisen, Magallanes), between 41°–55°S.</p> <p> <b>MAP 4.</b> Distribution map for <i>Notiocoenia pollinosa</i> Mathis.</p>Published as part of <i>Mathis, Wayne N. & Marinoni, Luciane, 2016, Revision of Ephydrini Zetterstedt (Diptera: Ephydridae) from the Americas south of the United States, pp. 1-110 in Zootaxa 4116 (1)</i> on pages 21-23, DOI: 10.11646/zootaxa.4116.1.1, <a href="http://zenodo.org/record/257322">http://zenodo.org/record/257322</a>
Nostima negramaculata Edmiston & Mathis, 2007, sp. nov.
No full text<i>Nostima negramaculata,</i> sp. nov. <p>(Figs. 9–14, 17, 20–21)</p> <p> <b>Diagnosis</b>.This species is distinguished from other congeners by the following combination of characters: crossveins r-m and dm-cu brown surrounded with dark spots; dark spots variable: 1–4 across r1 cell, 3–4 across r2+3 cell, 4–5 in r4+5 cell, 2–3 distad to dm-cu, 2–3 in cua1; thorax with dense silvery gray microtomentum on postpronotum; tergites completely covered with dense silvery bluish gray microtomentum.</p> <p> <b>Description</b>. Adults, small shore flies, body length 1.04–1.36 mm; yellowish brown to brown with silvery gray and yellowish silver microtomentum.</p> <p> <i>Head</i>. Frons yellowish brown with silvery gray microtomentum, anterior semicircle with yellowish silver microtomentum. Occiput yellowish brown silvery gray microtomentum. Lateral vertical seta 3/4 length of medial vertical seta; paravertical seta absent. Scape brown; basal flagellomere brown; arista filamentose. Facial background yellowish brown with yellowish silver microtomentum; band of silvery gray microtomentum along eye margin from antennal bases, along parafacial, and extending to the gena. Gena and postgena covered with silvery gray microtomentum; postgena ventrally shiny, brown. Maxillary palpus dark yellowish brown; prementum brown.</p> <p> <i>Thorax</i>. (Fig. 17). Scutal length 0.36–0.47 mm; scutellar length 0.16–0.21. Mesonotum yellowish-brown with yellowish silver and silvery bluish gray microtomentum, silvery gray vittae medially and along dorsocentral line; silvery gray microtomentose vitta along dorsocentral line with silvery gray microtomentum sparse between dorsocentral setae and dense posteriorly and anteriorly of dorsocentral setae covering postpronotum and postalar region; scutellum yellowish-brown with yellowish silver microtomentum, laterally with dense silvery gray microtomentum contiguous with silvery gray dorsocentral vitta on mesonotum; anepisternum brown with bluish silvery gray microtomentum; katepisternum brown with silvery bluish gray microtomentum; anatergite brown silvery gray microtomentum. Chaetotaxy: anterior dorsocentral seta 3/4 length of posterior seta; anterior notopleural seta 3/4 length of posterior seta; lateral scutellar seta 3/4 length of apical seta, apical setae convergent and on some specimens crossed. Wing (Fig. 20–21): length 0.94–1.23 mm; width 0.48–0.63 mm; costa-vein ratio 0.38–0.42; M-vein ration 0.19–0.31; background amber, maculate with brown spots, veins brown to dark brown; crossveins r-m and dm-cu brown surrounded with dark spots; dark spots variable: 1 to 4 across r1 cell, 3 or 4 across r2+3 cell, 4 or 5 in r4+5 cell, 2 or 3 in distally to dm-cu, 2 or 3 in cua1. Halter yellowish white. Legs brown with silvery bluish gray microtomentum</p> <p> <i>Abdomen</i>. (Figs. 10–11). Background brown; tergites covered with silvery bluish gray microtomentum. <i>Male terminalia</i>. (Figs. 12–14). Epandrium-cerci-surstyli complex fused; epandrium a narrow U-shaped dorsal band; cercus crescent-shaped and bearing several long setulae, separated dorsally from epandrium by narrow V-shaped space; surstylus fused dorsally with epandrium, with long posteroventral setae on a broadly rounded ventral projection; phallapodeme triangular in lateral view, posterior projection spatulate, anterior projections broadly rounded; aedeagus heavily sclerotized with anterior oval-shaped opening, small posteroventral indentation, broad anterodorsal projection and rounded anteroventral projection; gonite and hypandrium broadly fused anteriorly, with broadly rounded posteroventral projection with small pit-shaped structure, prominent ventromedial setula, and broadly rounded ventral projection; hypandrium rounded anteriorly.</p> <p> <b>Type specimen.</b> The holotype male is labeled “ NEW ZEALAND. SL: TeWaewae Lagoon (46°12.3'S, 167°38.1'E) 19 Jan 2004, W.N. Mathis [white]/ USNM ENT 0 0 0 26912 [white with barcode mounted upside down on pin]/HOLOYPE ɗ <i>Nostima negramaculata</i> Edmiston & Mathis NZAC [red].” The holotype is double mounted with the minuten through the center of the right thorax (minuten in a small rectangular block of silicone), is in excellent condition, and is deposited in the NZAC.</p> <p> <b>Other specimens examined. NEW ZEALAND. NORTH ISLAND. AK:</b> Auckland, Mt. Albert, Mt. Albert Road (36°53.6'S, 174°43.2'E), 29 Feb 1976, T. K. Crosby (1Ψ; NZAC). <b>ND:</b> Sandy Bay (35°33.4'S, 174°28.5'E; beach), 6 Oct 2002, D. and W. N. Mathis (2ɗ, 1Ψ; USNM); Whananaki South (mangrove and beach; 35°31.1'S, 174°27.2'E), 6–8 Oct 2002, D. and W. N. Mathis (1Ψ; USNM); <b>TO:</b> Tokaanu (37°58.2'S, 175°46.2'E), 3–5 Jan 2004, W. N. Mathis (2ɗ; USNM).</p> <p> <b>SOUTH ISLAND. FD:</b> Monowai (45°46.5'S, 167°37'E; 120 m), 20 Jan 2004, W. N. Mathis (1ɗ, 3Ψ; USNM). <b>NC:</b> Arthur's Pass, Andrews stream (42°58.7'S, 171°47.9'E), 30 Nov 1977, E. Schlinger (1ɗ, 1Ψ; NZAC). <b>SL:</b> TeWaewae Lagoon (46°12.3'S, 167°38.1'E), 19 Jan 2004, W. N. Mathis (26ɗ, 19Ψ; USNM).</p> <p> <b>Distribution.</b> (Fig. 9). Australasian/Oceanian: New Zealand (AK, FD, NC, ND, SL, TO).</p> <p> <b>Etymology.</b> The species epithet is derived from a description of the black spots on the wing, especially the black spots over the crossveins.</p> <p> <b>Remarks.</b> Variation in the wing maculation patterns can be seen even on the same specimen between the left and right wings.</p>Published as part of <i>Edmiston, James F. & Mathis, Wayne N., 2007, New Zealand species of the shore-fly genus Nostima Coquillett (Diptera: Ephydridae), pp. 1-16 in Zootaxa 1661</i> on pages 9-13, DOI: <a href="http://zenodo.org/record/179956">10.5281/zenodo.179956</a>
Parahyadina bifurcata Mathis & Zatwarnicki 2019, sp. nov.
No full text<i>Parahyadina bifurcata,</i> sp. nov. <p>(Figs. 17, 19–22, Map 4)</p> <p> <b>Diagnosis.</b> This species is distinguished from congeners by the following combination of characters: Adults. Small to moderately small shore flies, body length 1.85–2.20 mm.</p> <p> <i>Head</i> (Fig. 17): Lateroclinate fronto-orbital seta well developed, basal diameter comparable or only slightly reduced in comparison to basal diameters of vertical setae.</p> <p> <i>Thorax</i> (Fig. 17): 2 pairs of posterior dorsocentral setae, anterior seta shorter than posterior seta. Wing hyaline; costal section II about equal in length to costal section III; costal vein ratio 0.87–0.97; M vein ratio 0.23–0.25</p> <p> <i>Abdomen</i>. Tergites 3–5 with ventrolateral margin shallowly rounded; male tergite 5 extended posteriorly in same plane as tergite 4. <i>Male terminalia</i> (Figs. 19–22): Epandrium in posterior view (Fig. 19) as an inverted, irregular U, surstyli oriented posteriorly, widest at ventral level of cerci, in lateral view (Fig. 20) with dorsal portion of epandrium linear, shallowly concave on anterior and posterior margins, width of dorsal and ventral portions subequal; surstylar length (from level of fusion; Fig. 19) subequal to cercal height, angled very slightly posteriorly, with a medial, obtuse protrusion dorsally, thereafter ventrally tapered to narrowly rounded apex, apex bearing a single, short setula, also bearing 5 larger setulae in a vertical line along anterior margin at midlength, length of these setulae twice that of apical setula; cercus in posterior view (Fig. 19) narrowly obovate, shallowly curved with narrowed dorsal apex nearly abutting that of other cercus, in lateral view (Fig. 20) height almost twice width with anterior margin somewhat straight, posterior margin regularly but unevenly arched; aedeagus heavily sclerotized, in lateral view (Fig. 22) rectangularly tubular, longer than wide, with base shallowly bifurcate with asymmetric, short arms, thereafter apically as straight, gradually tapered to moderately rounded apex, in ventral view (Fig. 21) as a wide, squat, irregular drop with narrowed apical portion as a step before short apex, basally with shallow, medial V- shaped notch; phallapodeme in lateral view (Fig. 22) irregularly rectangular, elongate, keel elongate, narrowly spool shaped, base with blunt, digitiform, elongate process extended to aedeagal base, opposite angle moderately acutely angulate, in ventral view (Fig. 21) I-shaped with both apical and basal margins expanded; gonite and hypandrium broadly fused, in lateral view (Fig. 22) robustly L-shaped, gonal portion shorter but more robust, bearing a shallowly triangular, sub-basal projection and an apical, digitiform projection, hypandrial portion much longer than wide, narrowly rectangular, lateral margins irregular, in ventral view (Fig. 21) wider than long, basal portion (hypandrium) band-like, shallowly curved, lateral extensions (gonite) longer than wide, irregular, with apical portion bifurcate, medial prong oriented medially, digitiform, lateral prong narrowly triangular, shorter than medial prong.</p> <p> <b>Type Specimen.</b> The holotype male is labeled “ NEW ZEALAND. S. Isl. FD: MonowaiRiv. 45°46.7’S 167°35.7’E; 171 m, 17–18 Jan. 2004, W. N. Mathis/ USNM ENT 00028123 [plastic bar code label]/ HOLOTYPE ♂ <i>Parahyadina bifurcata</i> Mathis & Zatwarnicki NZAC [red].” The holotype is double mounted (minuten in block of plastic elastomer), is in good condition (abdomen removed and dissected), and is deposited in NZAC.</p> <p> <b>Type locality.</b> New Zealand. South Island. FD: Monowai (45°46.5’S, 167°37.0’E; 120 m).</p> <p> <b>Other specimens examined.</b> <b>SOUTH ISLAND. KA:</b> Hapuku Stream (42°13’S, 173°45.3’E; 420 m), 8 Jan 2004, W. N. Mathis (1♂; USNM).</p> <p> <b>Distribution</b> (Map 4). Australasian/Oceanian: New Zealand. South Island (FD, KA).</p> <p> <b>Etymology.</b> The species epithet, <i>bifurcata,</i> is of Latin derivation and refers to the deeply bifurcate aedeagal base in lateral view.</p> <p> <b>Remarks.</b> Although similar to <i>P. bulla</i> and <i>P. lacustris,</i> this species is distinguished by the greater number of setulae (5–6) on the surstylus at midheight. In addition, the aedeagus in lateral view is shoe-like with tapered and narrow “toe,” and the base of the aedeagus is relatively deeply bifurcate.</p>Published as part of <i>Mathis, Wayne N. & Zatwarnicki, Tadeusz, 2019, Revision of the Shore-fly Genera Parahyadina Tonnoir and Malloch and New Zealand Hyadina Haliday (Diptera: Ephydridae), pp. 401-440 in Zootaxa 4623 (3)</i> on pages 415-416, DOI: 10.11646/zootaxa.4623.3.1, <a href="http://zenodo.org/record/3258532">http://zenodo.org/record/3258532</a>
Studium slitin titanu s využitím neutronové difrakce
No full textTitle: Investigation of titanium alloys using neutron diffraction Author: Gergely Németh Department / Institute: Department of Physics of Materials Supervisor of the master thesis: prof. RNDr. Kristián Mathis, Ph.D., DrSc., Department of Physics of Materials Abstract: Titanium grade 2 was treated by multiple passes of the continuous equal- channel angular pressing technique (CONFORM ECAP) and, after each pass, additionally by rotary swaging. The residual strain field in samples processed by only CONFORM ECAP was studied by neutron diffraction strain scanning. In order to elucidate the microscopic background and calculate the related residual stress field, the local microstructure was thoroughly investigated by various experimental techniques. The microstructure and the deformation behavior of the rotary swaged samples was studied by transmission electron microscopy and by in-situ neutron diffraction during compression. The results of the analyses indicated that microstructural gradients were present in the material as the result of the inhomogeneous deformation during the CONFORM ECAP treatment. These gradients were identified as the main reason of the presence of residual stress fields. The distributions of stress fields calculated based on microstructural parameters were in correlation with simulation...Název práce: Studium slitin titanu s využitím neutronové difrakce Autor: Gergely Németh Katedra: Katedra fyziky materiálů Vedoucí disertační práce: prof. RNDr. Kristián Mathis, Ph.D., DrSc., Katedra fyziky materiálů Abstrakt: Titan grade 2 byl zpracován vícery průchody kontinuální metodou protlačování lomeným kanálem stejného průřezu (CONFORM ECAP) a po každém průchodu navíc rotačním kováním. Pole zbytkové deformace ve vzorcích zpracované pouze CONFORM ECAP-em bylo studované skenem neutronové difrakce. Za účelem objasnění mikroskopického pozadí a vypočítání souvisejícího pole zbytkového napětí byla lokální mikrostruktura podrobně prozkoumaná různými experimentálními technikami. Mikrostruktura a deformační chování rotačně kovaných vzorků byly zkoumány transmisním elektronovým mikroskopem a in-situ neutronovou difrakcí během stlačení. Výsledky analýz naznačili, že gradienty mikrostruktury byly přítomny v materiálu jako důsledek nehomogenní deformace během CONFORM ECAP-u. Tyto gradienty byly identifikovány jako hlavním důvodem přítomnosti zbytkových napěťových polí. Rozložení napěťových polí vypočítané na základě mikrostrukturních parametrů byla v korelaci s výsledky simulací. Dodatečné rotační kování mělo za následek nanokrystalickou strukturu zrn s rostoucí homogenitou odpovídající zvyšujícímu se počtu...Department of Physics of MaterialsKatedra fyziky materiálůFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult
Quelques pièces présentées aux Journées du patrimoine 2020
No full textVanessa Selbach présente un jeu de cartes pédagogique du XVIIIe s. [embed]https://www.youtube.com/watch?v=yVuHhRC1xLc Rémi Mathis présente l'album de dessins d'enfant du duc de Bourgogne, petit-fils de Louis XIV et père de Louis XV. https://www.youtube.com/watch?v=huR9adAWj9
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